Hi,
Consider the following Priority Schedular settings.
Resource Parition     CPU Limit         RP-Weight        Allocation Group       AG-Weight
===========    =======       =======      ==========        =======
RP0                         100%              20                     AG01                         30

I vaguely recall setting up TASM years ago before Viewpoint and we were encouraged to keep back a small percentage of CPU from the system.  I think we may have set the CPU limit for the system to something like 96%.  I do not recall where exactly that setting was made in Priority Scheduler.  We have since migrated from TASM using TDWM to TASM on Viewpoint